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Finding the Fourth Proportional to 934.69, 1,402.38 and 447.41

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Solution

The fourth proportional to 934.69, 1,402.38 and 447.41 is: 671.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.69 : 1,402.38 = 447.41 : x
  2. Step 2: Convert to fraction form
    934.69/1,402.38 = 447.41/x
  3. Step 3: Cross multiply
    934.69x = 1,402.38 × 447.41
  4. Step 4: Simplify right side
    934.69x = 627,434.45
  5. Step 5: Solve for x
    x = 627,434.45/934.69
  6. Step 6: Final answer
    x = 671.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.